WebSpell > 4.0 Authentication Bypass and arbitrary code execution

[r.verton@gmail.com]

WebSpell Authentication Bypass and arbitrary code execution
        
    Vendor      : WebSpell
    URL         : http://www.webspell.org/
    Version     : All
    Risk        : SQL Injection, unchecked file upload

Description:
webSPELL is a free Content Management System (CMS) for clans and gaming 
communities, providing all needed features like forums, 
gallery, clanwar system. Because of some serious flaws in the login and 
cookie-handling function, login can be easily bypassed and 
arbitrary php code executed via uploading a php file.
Notes: magic_quotes_gpc() has to be set OFF

Details:
Due to an SQL Injection via the sended 'ws_auth' cookie, WebSpell is vulnerable 
to an Authentication Bypass. 

$login_per_cookie = false;

if(isset($_COOKIE['ws_auth']) AND !isset($_SESSION['ws_auth'])) {

 $login_per_cookie = true;

 $_SESSION['ws_auth'] = $_COOKIE['ws_auth'];

}



systeminc('login');

[...]

if(stristr($_SESSION['ws_auth'], "userid")===FALSE){

    $authent = explode(":", $_SESSION['ws_auth']);

           $ws_user = $authent[0];

          $ws_pwd = $authent[1];

           $check = safe_query("SELECT userID FROM ".PREFIX."user WHERE 
userID='$ws_user' AND password='$ws_pwd'");

          while($ds=mysql_fetch_array($check)) {

             $loggedin=true;

            $userID=$ds['userID'];

      }
}

As seen in the above codee, the Cookie 'ws_auth' is divided into two parts: The 
userid and the password.
With the following cookie you can bypass this function and login as 
admin(userid 1):

1;' OR '1'='1

When 'logged in' an PHP-file with arbitrary code can be uploaded via the "add 
squad" feature.

Solution:
    Use mysql_real_escape_String() or addslashes() for the safe_query()

Credits:
    Robin Verton < r.verton at gmail com>